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Thread: Error: '{' expected
- 07-25-2007, 10:29 PM #1
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Error: '{' expected
Hello, I have this stupid error. I would probably laugh at myself, because my error is "{" missing on like 34. It is pretty simple I would assume, but I cant figure out what I'm missing. The big thing I have noticed in Java in that everything has to be in classes, so I'm not sure if my set up is right. But yeah, I'm pretty much trying to code this program like I would in C++.
Java Code:> Executing: C:\bin\javac.exe" "C:\dsp1.java" C:\dsp1.java:34: '{' expected public class fraction() { ^ 1 error > Execution finished.
Java Code:import java.util.Scanner; public class dsp1 { public static void main(String[] args) { fraction x=new fraction(), y=new fraction(), result=null; String op; Scanner kb=new Scanner(System.in); System.out.print("please enter an expression int int op int int\n"); System.out.print("for example, 3 4 - 2 3 \n"); System.out.print("where 3 4 and 2 3 represent the fractions 3/4 and 2/3:\n"); x.read(kb); //read the first fraction op=kb.next(); //read the operator y.read(kb); //read the second fraction switch(op.charAt(0)) { case '+': result=x.plus(y); break; case '-': result=x.minus(y); break; case '*': result=x.times(y); break; case '/': result=x.div(y); break; default: System.out.println("incorrect operator"); System.exit(1); } if (result!=null) System.out.print(x+" "+op+" "+y+" = "+result+"\n"); } //end main() } //end dsp1 public class fraction() { public int num, den; public void read(); public fraction plus(fraction); /*public fraction minus(fraction); public fraction times(fraction); public fraction div(fraction);*/ public void lcf(); void read(){ num = kb.next(); den = kb.next(); return; } fraction plus(fraction k){ fraction temp; temp.den = den * k.den; temp.num = (num*k.den)+(k.num*den); temp.lcf(); return temp; } void lcf(){ for(int x = den;x > 0;x--){ if(den%x == 0 && num%x == 0){ den = den/x; num = num/x; } } } }
Thanks.
- 07-26-2007, 10:34 AM #2
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The simple answer is yes you do as they are different classes. You could, however, pass the scanner into the read function:
Java Code:public void read(Scanner kb) { ..... }
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